Capacitor resistance unit



Nov. 23, 1965 H. R. PERSON 3,219,915

CAPACITOR RES ISTANCE UNIT Filed March 27, 1961 //v VEN TOR HERMON 1?. Ps/aszJ/v r 3 W/ 77vs5 'W FRED BAA/6 us 7' TOP NE V5 United States Patent 3,219,915 CAPACITOR RESISTANCE UNIT Herman R. Person, Columbus, Nebr., assignor. to Dale Electronics Incorporated, Columbus, Nebr. Filed Mar. 27, 1961, Ser. No. 98,390 i i 4 Claims. (Cl. 323-74) This invention .relatesto electric capacitor resistance units and more specifically to a combination capacitorand resistor parallel circuit unit.

Resistors and capacitors are well known. Heretofore, however, attempts to combine the structure of the two in a single homogenous unit have not met withsuccess for a number of reasons. First, heretofore the product of such a combination has been too heavy for practical utilization thereof. Second, such combination unitshave been too bulky. Third, they have been unable to carry a heavy electrical load in proportion to their size without .overheating, and four, tend to deteriorate at the range of temperatures to which they are exposed inoperation.

Therefore, one of the principal objects of this invention is to provide the combination of an .electric resistor and an electric capacitor having a parallel circuit and in a single unit.

A further object of this invention is to provide'anelece tric capacitor resistance unit that is light in weight and more adaptable in utilization than devices heretofore known in the art. I

A still further object of this invention is to provide an electric capacitor resistance unit that is small and compact in size. i v 1 A still further object of this invention is to provide'an electric capacitor resistanceunit which is able to withstand a heavy electrical load in proportion to its size without overheating. i

An even still further object of this invention is to provide an electric capacitor resistance unit which will not deteriorate at the range of temperatures to which it is exposed in operation.

Even still further objects of this invention are to provide an electric capacitor resistance unit which is economical in manufacture, refined in appearance, and substantially indestructible in use.

These and other objects will be apparent to those skilled in the art.

My invention consists in the construction, arrangement, and combination, of the various parts of the device, whereby the objects contemplated are attained as hereinafter more fully set forth, specifically pointed out in my claims, and illustrated in the accompanying drawings, in which:

FIG. 1 is a perspective, partially sectional view of my capacitor resistance unit, and

FIG. 2 is a cross-sectional side view taken on line 22 of FIG. 1 and more fully illustrates its construction.

In the drawings, the numeral generally designates the elongated cylinder casing portion of an electrical resistor having the usual end caps 12 and 14 at each end thereof, best shown in FIG. 2. The usual leads 16 and 18 project from the opposite ends of the resistor and are operatively secured to the inner ends of the cylindrical contact plugs 20 and 22. The longitudinal axis of the contact plugs 20 and 22 are in spaced concentric relation to that of the resistor casing 10, shown in FIGS. 1 and 2.

All of the above components are concentrically embedded in an epoxy and Fiberglas cylindrical rod 24. The outer end portions of the contact plugs 20 and 22 extend beyond the opposite ends of the rod 24. Teflon tape 26 and an electricity conducting aluminum or like foil strip 28 are joined and disposed in wrapped relation around the rod 24 in such a manner that the longitudinal surface 3,219,915 Patented Nov. 23,. 1965 ofthe Teflon tape 26 and foil strips 28 is transverse to the axis of the rod 24 and extends from one end of the rod 24 toward the other end of therod 24 and terminates intermediate the middle section and the aforementioned other end of the rod 24. In a like manner, the Teflon tape 26 and the aluminum or like foil strip 28' are joined and disposed in-wrapped relation around the rod 24 but extend from the opposite end of the rod 24 and terminate intermediate the middle section and theirrespective opposite ends of the rod 24. Thus, the capacitor strips 26-28 and 26" and 28 will extendbeyond each other at the middle section of the rod 24 and are so wrapped'as to overlay each other at each winding around the rod :24, asshowninFIG.2.- e e A suitable electrical grease, such as silicon grease, is disposed in the spaced areas 30 created at each overlapping wind of the capacitor strips 2628 and 26' and 28. A pressure sensitive adhesive Teflon tape or like protecting casing 32 is disposed as an outside shell about the wrapped strips 26-28 and 26' and 28'. A Y

Electricity conducting end caps 34 and 36 are disposed over each end of the cylinder encased by the covering means 32 and have concentric apertures which tightly contact the contact plugs 20 and 22 and permit them to extend therethrough, as shownin FIGS; 1 and 2. Preferably, the contact plugs 20 and 22 and the concentric aper- 26 and 28', respectively, thus providing a resistor and a capacitor, having a parallel circuit,-combined into a single,

light, compact unit 7 e It has been found that capacitor-resistance units manufactured from the preferred embodimentof this invention are, able to easily withstandtemperatures at which even ceramic capacitors deteriorate. Further, they are able to withstand much greater loads of electrical energy than such components heretofore known in the art. Units of the preferred embodimentof this invention are currently being manufactured and successfully employed in lightning arrestors for airplanes-a utilization which capacitors and resistors heretofore known in the art have not been able to successfully withstand.

Some changes may be made in the construction and arrangement of my capacitor resistance unit without departing from the real spirit and purpose of my invention, and it is my intention to cover by my claims, any modified forms of structure or use of mechanical equivalents which may be reasonably included within their scope.

I claim:

1. A capacitor resistance unit for lightning arrestors for airplanes, comprising in combination,

a tubular condenser unit including alternate turns of conductive and dielectric material wound in an overlapping manner into a cylinder;

a cylindrical axial support member of insulation material within said cylinder, said support being of solid material throughout its entire construction and having a continuous rounded imperforate outer surface throughout its total area, said support being of a material having high strength and high temperature resistance properties similar to fiberglass,

a resistance unit embedded within said axial support member and having electrical leads at either end,

a cap element of electrical conductive material mounted on each end of said cylinder and at least one cap element contacting the ends of the turns of conductive material and both the ends of said axial support member being in mating contact with said cap elements,

said cap elements each having a threaded aperture formed therein,

a conductive shaft embedded in each end of said axial having a continuous rounded imperforate outer sursupport and connected to each one of said electrical face throughout its total area, said axial support beresistance leads, said shaft having a threaded portion ing of a fiberglass material having high strength and threadably engaging the threaded aperture of the adhigh temperature properties, jacent cap element to obtain the desired tight fit be- 5 a. resistance unit embedded within said axial support tween said cap elements on said cylinder against the member and having electrical leads at either end, ends of said axial support member and said turns of a cap element of electrical conductive material mountconductive material, and said shafts extending beed on each end of said cylinder and at least one cap yond the outer faces of said cap elements to provide element contacting the ends of the turns of conductive electrical terminals. material and both the ends of said axial support mem- 2. A capacitor resistance unit for lightning arrestors ber being in mating contact with said cap elements,

for airplanes, comprising in combination, a conductive shaft having a threaded portion embedded a tubular condenser unit including alternate turns of in one end of said axialsupport member, and

conductive and Teflon material wound in an overanother conductive shaft having athreaded portion emlapping manner into a cylinder, said Teflon material bedded in the opposite end of said axial support being able to withstand high temperatures, member,

a cylindrical axial support member of insulation maeach of said shafts connected to the adjacent electrical terial within said cylinder, said support being of solid material throughout its entire construction and having a continuous rounded imperforate outer surface strength and high temperature properties,

resistance lead, and each of said shafts having a threaded portion threadably engaging the threaded aperture of the adjacent cap element to obtain a tight fit between said cap elements on said cylinder against the ends of said axial support member and said turns of conductive material, and said shafts extending bea resistance unit embedded within said axial support member and having electrical leads at either end, the imbedded condition of said resistance unit within said axial support member providing the sole means yond the outer faces of said cap elements to provide electrical terminals. 4. The capacitor resistance unit for lightning arrestors for airplanes of claim 3 wherein said turns of dielectric of support for said resistance unit, material are formed of Teflon and said axial support mema cap element of electrical conductive material mountber is formed of a combination material with epoxy added ed on each end of said cylinder and at least one cap to said fiberglass. element contacting the ends of the turns of conductive material and both the ends of said axial support member being in mating contact with said cap elements,

References Cited by the Examiner UNITED STATES PATENTS and each of said electrical resistance unit leads being con- 1671478 5/1928 Ma-rbury 317 256 nected to the ,ld-acent ca element 2,615,091 10/1952 Keltlcy 323-74 X 1 P 2,644,122 6/1953 Boardman et al. 323-74 x 3. A capacitor resistance unit for lightning arrestors for airplanes, comprising in combination,

- a tubular condenser unit including alternative turns of conductive and dielectric material wound in an overlapping manner into a cylinder;

acylindrical axial support member of insulation material within said cylinder, said support being of solid material throughout its entire construction and OTHER REFERENCES Modern Dielectric Materials: Birks, J. B., Haywood Co., London 1960, page 219. QC 585B5.

LLOYD MCCOLLUM, Primary Examiner.

MILTON O. HIRSHFIELD, Examiner. 

2. A CAPACITOR RESISTANCE UNIT FOR LIGHTNING ARRESTORS FOR AIRPLANES, COMPRISING IN COMBINATION, A TUBULAR CONDENSER UNIT INCLUDING ALTERNATE TURNS OF CONDUCTIVE AND TEFLON MATERIAL WOUND IN AN OVERLAPPING MANNER INTO A CYLINDER, SAID TEFLON MATERIAL BEING ABLE TO WITHSTAND HIGH TEMPERATURES, A CYLINDRICAL AXIAL SUPPORT MEMBER OF INSULATION MATERIAL WITHIN SAID CYLINDER, SAID SUPPORT BEING OF SOLID MATERIAL THROUGHOUT ITS ENTIRE CONSTRUCTION AND HAVING A CONTINUOUS ROUNDED IMPERFORATE OUTER SURFACE THROUGHOUT ITS TOTAL AREA, SAID AXIAL SUPPORT BEING OF A COMBINATION FIBREGLASS EPOXY MATERIAL HAVING HIGH STRENGTH AND HIGH TEMPERATURE PROPERTIES, A RESISTANCE UNIT EMBEDDED WITHIN SAID AXIAL SUPPORT MEMBER AND HAVING ELECTRICAL LEADS AT EITHER END, THE IMBEDDED CONDITION OF SAID RESISTANCE UNIT WITHIN SAID AXIAL SUPPORT MEMBER PROVIDING THE SOLE MEANS OF SUPPORT FOR SAID RESISTANCE UNIT, A CAP ELEMENT OF ELECTRICAL CONDUCTIVE MATERIAL MOUNTED ON EACH END OF SAID CYLINDER AND AT LEAST ONE CAP ELEMENT CONTACTING THE ENDS OF THE TURNS OF CONDUCTIVE MATERIAL AND BOTH THE ENDS OF SAID AXIAL SUPPORT MEMBER BEING IN MATING CONTACT WITH SAID CAP ELEMENTS, AND EACH OF SAID ELECTRICAL RESISTANCE UNIT LEADS BEING CONNECTED TO THE ADJACENT CAP ELEMENT. 